Firefox segfault when the hardened profile activated

[j4m3s-s]

Describe the bug
Firefox segfault on launch when using the hardened profile.

To Reproduce
Steps to reproduce the behavior:

1. Install firefox
2. Activate the hardened profile
3. launch firefox

Notify maintainers
@taku0

Metadata

 - system: `"x86_64-linux"`
 - host os: `Linux 5.4.59, NixOS, 20.09pre-git (Nightingale)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.7`
 - channels(root): `"nixos, nixos-hardware"`
 - channels(j4m3s): `"home-manager"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixos modules affected by the problem
module:
  firefox-bin

[ajs124]

This might be a duplicate of #97898

[j4m3s-s]

Indeed, closing.